So your 14 got a 7inch penis but your foreskin isn't back your still a virgin what should you do is it because your a virgin or is it a medical reason please help?

There is a small chance that the reason is a medical problem. However you will most likely to be able to loosen the fore skin by gently applying a little backwards pressure on it while having a shower ( the warm water helps) every day. The foreskin is a very elastic and flexible bit of equipment. do it gently and a little at a time, after all there is no real hurry.